perf: improve encoding performance

[abemedia]

No description provided.

[github-actions]

Benchmark Result

Benchmark diff with base branch

goos: linux
goarch: amd64
pkg: github.com/abemedia/go-don
cpu: Intel(R) Xeon(R) Platinum 8171M CPU @ 2.60GHz
          │ bench-master.txt │         bench-new.txt         │
          │      sec/op      │   sec/op     vs base          │
Handler-2        570.2n ± 1%   569.2n ± 1%  ~ (p=0.838 n=10)

          │ bench-master.txt │         bench-new.txt          │
          │       B/op       │    B/op     vs base            │
Handler-2         72.00 ± 0%   72.00 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal

          │ bench-master.txt │         bench-new.txt          │
          │    allocs/op     │ allocs/op   vs base            │
Handler-2         2.000 ± 0%   2.000 ± 0%  ~ (p=1.000 n=10) ¹
¹ all samples are equal

Benchmark result

goos: linux
goarch: amd64
pkg: github.com/abemedia/go-don
cpu: Intel(R) Xeon(R) Platinum 8171M CPU @ 2.60GHz
          │ bench-new.txt │
          │    sec/op     │
Handler-2     569.2n ± 1%

          │ bench-new.txt │
          │     B/op      │
Handler-2      72.00 ± 0%

          │ bench-new.txt │
          │   allocs/op   │
Handler-2      2.000 ± 0%

[codecov]

Codecov Report

Patch coverage: 33.33% and project coverage change: +0.69 🎉

Comparison is base (a1d75f6) 89.73% compared to head (aad7e7c) 90.42%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
+ Coverage   89.73%   90.42%   +0.69%     
==========================================
  Files          19       19              
  Lines         779      773       -6     
==========================================
  Hits          699      699              
+ Misses         63       59       -4     
+ Partials       17       15       -2     

Impacted Files	Coverage Δ
encode.go	42.85% <20.00%> (+4.14%)	⬆️
decode.go	60.00% <100.00%> (+7.82%)	⬆️

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